Sihai network

The difference between five leaf fan and three leaf fan

4hw.com.cn: we usually use three fan blades. But in the past two years, four leaf, five leaf and double-layer fans have also become popular. Is five leaf fan better or three leaf fan better? What's the difference between them?

Three leaves or five leaves of floor fan

Five leaves of floor fan are better. Compared with the five leaf fan, the three leaf fan produces less air flow at the same speed, of course, the air resistance torque to the three leaf fan is also small. Therefore, when the motor speed parameters are determined, the more the number of propeller blades, the greater the air volume, it can be seen that the five leaf fan is better than the three leaf fan.

Generally speaking, the more blades an electric fan has, the better its air supply effect will be. Although it will increase the load, the more blades, the smaller the 'wind', the softer the wind and the better the mute effect. "Five leaf fan" is mainly based on the principle of aircraft wing and propeller. The fan designed by using these principles has obvious characteristics of high efficiency and low noise.

The difference between a three leaf fan and a five leaf fan the area of a single leaf of a three leaf fan is larger than that of a five leaf fan, and the range of its action with air is also increased, resulting in greater noise; However, compared with the five leaf fan, the mold and manufacture of the three leaf fan is much easier and cheaper. The connection between the root of the fan and the central axis is wide, so the three leaf fan with the same material has much stronger blades than the five leaf fan. Therefore, generally speaking, the fans with small noise are mostly five leaf fans, and the wind power of five leaf fans is also relatively soft.

How to choose the type of electric fan

At present, there are ceiling fans, table fans, floor fans, Hongyun fans, ceiling fans, wall fans and derivative products such as micro ceiling fans, office fans, sofa fans, multi-purpose fans and so on. Each fan has different specifications. Consumers should decide which fan to buy according to their use, use environment and hobbies.

Number of leaves

Considering the characteristics of rotating balance, the number of blades of general electric fan is odd, even blades are easy to produce resonance when rotating, resulting in damage. Originally, the electric fans are basically three leaves. In recent years, there have been many five leaf fans. This is because the more the number of fan leaves, the more even and soft the wind is cut. But the more the leaves, the greater the motor load, so the number of fan leaves can not be too much.

Fan motor

Compared with the common motor, the fan of DC variable frequency motor has more advantages in noise control, and DC variable frequency motor saves more power than AC variable frequency motor. A good motor not only turns smoothly and is not easy to be damaged, but also has low noise. At the same time, pay attention to the lubricating oil in the motor when purchasing.

function

The function selection mainly focuses on desktop and floor fan. These two types of electric fans are generally divided into standard universal type and electronic luxury type. The former is characterized by simple structure, convenient operation and low price, generally only with two functions of speed regulation and reversing; the latter is characterized by complex and changeable functions and luxurious and exquisite modeling. Consumers can decide whether to choose based on the premise of practicality or the purpose of utility, decoration and luxury. {www.zhicHangshi.Com}

quality

The baking paint and electroplating of high quality electric fan are bright and smooth without bubbles and scratches. There is no loosening of each screw pin. When operating the rotary shaft and switch, the pronunciation is clear, the positioning is accurate, and the light touch switch command is correct and reliable. When the blades are moved, they rotate smoothly and easily without touching any parts. When they stop, the blades gradually diffuse and stop naturally.

Noise problems

For human beings, the volume below 45dB is suitable for sleep, while the volume above 50dB will have some obvious sound, and the volume above 65dB is equivalent to shouting. Many fans nowadays make a lot of noise. Excellent fan noise can even be controlled at about 40dB.